Perhaps you should try some spelling variations:
phuong cong » phuong dong, phong cong, phung cong
doi chieu » doc hieu, doi chi, ho chieu
trung va » truong va, trung ha, trung tam
trang va » tran van, hang va
cong tan » cong tac, cong san, cong thanh
tan khan » tan khang, tan nhan, toan khoan
khan cap » khan ap, than cap, khoan cam

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: ((doi chieu) or (theo tieu)) xanh - thanh ((trung va) OR (trang va)) phuong cong tan khan cap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((doi chieu) OR (theo tieu)) xanh - thanh ((trung va) OR (trang va)) phuong cong tan khan cap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((doi chieu) or (theo tieu)) xanh - thanh ((trung va) OR (trang va)) phuong cong tan khan cap".
• Adding a wildcard symbol may retrieve word variants: ((doi chieu) or (theo tieu)) xanh - thanh ((trung va) OR (trang va)) phuong cong tan khan cap*.